JB Corn's book has a lot of excellent info on that and goes into the topic thoroughly. In fact, he tells you how to build an entire haunt from the ground up . . . literally. (His was built on a deck so it could be built over any terrain . . . an ATH: All Terrain Haunt!) I can send you the link to a PDF version if you like. His books are now free and in the public domain.

Can you rephrase your question? You asked how to make a wall panel. I sent you link to pdf on how to make one and how to make a jig to make one. What am I missing. It is a simple frame with one or two pieces of plywood on it. You really should be able to figure this out, but here are a few Wall panel truths to help you out.

1. Do not use staples to hold it together. Yes staples are fast, but long term they make repair difficult.

2. Do not use OSB, it is cheap but you will always have the particle board texture no matter what set it is in. It also makes for a heavy panel

3. Framing does not matter much, build what makes you happy. I like two vertical and three horizontal. I also only skin one side.

4. Build them for your show, I have to put up and tear down my show every year, so I favor lighter panels because of how often they get carried around

5. Make them strong, actors will climb on them- guests will run into them- you will want to use them for years. Do not skimp on materials or quality
I dont think you need to know any more than that unless you have a specific question you are not asking.

Scottylmt- Building them strong can mean many things, but here are a few tips.
Use more screws than you think you need, like 7 screws across the three short sides and 13 screws down the long sides. If it is in a high traffic area I often put plywood triangles on the non skinned side to strengthen the corners.
Just make sure it feels sturdy, you can go with strong framing or stronger skin, that is up to you.
Allen H

Building wall panels isn't rocket science. The more pressure a person might be likely to put on a panel, the stronger it should be. If you need a wall behind a scene that no one will come in contact with use 1/4 luan, unless you plan on hanging heavy props on it. If you have an area that people are going to be all up on the wall, I'd use 1/2 plywood.

Build smart and don't be lazy.. If you're hesitant about building your wall panels out of 1/2 plywood due to the wieght then you should plan to have help setting them up. Get your plan writen down and figure out how many of what kind of wall panels you need before you start building.